High efficiency transmitter front-ends integrated with planar antennas and PBG

Hang, C.Y.; Deal, W.R.; Qian, Yongxi; Itoh, T.

doi:10.1109/apmc.2000.925972

Cited by 10 publications

(6 citation statements)

References 12 publications

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“…In this paper, the filtering circuits based on traditionally capacitor and EMI filter are studied separately and compared with the advantages and disadvantages associated with each of them [1], [2].…”

Section: Prefacementioning

confidence: 99%

EMC filtering design of biasing circuit for broadband active device

Liang

2013

2013 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE TECHNOLOGY &Amp; COMPUTATIONAL ELECTROMAGNETICS

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Broadband transceiver circuits are so important for the realization of microwave instruments and radar systems that may have decisive influence on the performance of the whole product. Because of very wide frequency range, transceiver frontend circuits in microwave apparatus covering from DC to microwave band, broadband active devices are widely applied in the circuits. And the leakage of useful signal and noise arising from the improper bias circuit design for these active devices may not only decline the system's sensitivity, but also even make it unworkable at the worst. At the same time, the reasonable design of bias circuit for these active devices is the very important technique for avoiding electromagnetic interference (EMI) and improving electromagnetic compatibility (EMC). In this paper, the filtering features of capacitor, the traditionally filter component, and EMI filter are discussed and better filter performance can achieved when applying the EMI filter to microwave broadband active devices' biasing circuits. Cooperate with the resistor, this kind of filter circuit can completely satisfy the bias circuit requirements of active devices for high sensitivity circuit and enhance the system's electromagnetic compatibility. Index Terms-Broadband active device, Capacitor, EMI Filter, EMC

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Section: Prefacementioning

confidence: 99%

EMC filtering design of biasing circuit for broadband active device

Liang

2013

2013 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE TECHNOLOGY &Amp; COMPUTATIONAL ELECTROMAGNETICS

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“…Obviously, transmission zeros occur at f where S 21 = 0 or Z 21 = 0. Therefore, for the first state the frequencies of the transmission zeros should satisfy the following equation derived from (3) and 6:…”

Section: Filter Designmentioning

confidence: 99%

“…These methods are suitable for narrow stopbands normally. In order to meet the requirement of wide-band communication techniques, the photonic band gap (PBG) periodic structures [3,4], the defected ground plane (DGS) structures [5][6][7][8] and signal interference technique [9,10] are presented. As one of the deficiencies, however, all these BSFs are lack of the tunable central frequency and bandwidth and fail to meet the stringent requirement of modern multi-functional and cognitive systems.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Bandstop Filter With Adjustable Bandwidth and Center Frequency

Zhao¹,

Li²,

Wu³

et al. 2012

PIER Letters

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A bandstop filter with reconfigurable two-state center frequency and bandwidth is presented. The prototype of the proposed reconfigurable bandstop filter consists of one section of anti-coupled line short-circuited by an open low-impedance line. By introducing PIN diodes, this bandstop filter exhibits a lower stopband response centered at a lower frequency in the ON state, and a wider stopband response centered at a higher frequency in the OFF state. Filter using the proposed structure is designed, simulated and measured. The results confirm the designing method by showing a narrow stopband with the center frequency of 1 GHz and a wide stopband of 2.9 GHz bandwidth centered at 2.5 GHz respectively.

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“…Naturally, wider stopband at a compact size became an important issue for the practical aspect of the PBG applications. Wider bandgap is required to suppress the harmonics generation in active circuits [3] and the spurious modes or leakage generation of the filter applications [6]. Simple increments of the PBG cells and the wave impedance difference, however, result in inherent problems of the increasing size and the passband degradation [4].…”

Section: Introductionmentioning

confidence: 99%

Wideband and compact bandstop filter structure using double-plane superposition

Kim

Lee

2003

IEEE Microw. Wireless Compon. Lett.

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A novel bandstop filter (BSF) structure is proposed and measured for wideband and compact circuit applications. The proposed BSF realizes the wide stopband (2-octave) characteristics by superposing two different photonic bandgap (PBG) structures into a coupled double-plane configuration. Only three cells of the proposed structure are enough for the measured 10 dB stopband from 4.3 to 16.2 GHz. We expect this novel BSF structure is widely used for compact and wideband circuit applications, such as compact high-efficiency power amplifiers using harmonic tuning techniques.

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High efficiency transmitter front-ends integrated with planar antennas and PBG

Cited by 10 publications

References 12 publications

EMC filtering design of biasing circuit for broadband active device

EMC filtering design of biasing circuit for broadband active device

Reconfigurable Bandstop Filter With Adjustable Bandwidth and Center Frequency

Wideband and compact bandstop filter structure using double-plane superposition

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